The unreasonable power of nested decision rules. By Jared Wilber & Lucía santamaría Let's Build a Decision Tree Let's pretend we're farmers with a new plot of land. Given only the Diameter and Height of a tree trunk, we must determine if it's an Apple, Cherry, or Oak tree. To do this, we'll use a Decision Tree. start splitting Almost every tree with a Diameter ≥ 0.45 is an Oak tree! Thus, we can p